The National Institute of Neurological Disorders and Stroke is issuing a funding opportunity announcement to support program project grant applications that propose innovative, interactive research to answer significant scientific questions. The program project grant is designed to support research in which the funding of several interdependent highly meritorious projects as a group offers significant scientific advantages over support of these same projects as individual research grants. The key aspects of this opportunity include: • The funding of several interdependent projects as a group to achieve significant scientific advantages • Support for innovative, interactive research to answer significant scientific questions • The opportunity is open to various types of organizations, including universities, non-profits, and government agencies • The application deadline is May 7, 2024